The voltage across an air-filled parallel-plate capacitor is measured V_i = 146.
ID: 1615931 • Letter: T
Question
The voltage across an air-filled parallel-plate capacitor is measured V_i = 146.0 V. When a dielectric is inserted and completely fills the space between the plates, as in the figure below, the voltage drops to V_2 = 42.9 V. What is the dielectric constant of the inserted material? ________ Can you identify the dielectric? paper nylon neoprene rubber Bakelite teflon If the dielectric doesn't completely fill the space between the plates, what could you conclude about the voltage across the plates?Explanation / Answer
a)
k = dielectric constant
K (Voltage after inserting dielectric) = (Voltage before insertion)
42.9 k = 146
k = 3.4
b)
the voltage will be greater than 42.9 volts
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